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Search Results: 1 - 10 of 9497 matches for " Armando Reyes-Engel "
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Genetic polymorphisms in folate pathway enzymes, DRD4 and GSTM1 are related to temporomandibular disorder
Angel Aneiros-Guerrero, Ana M Lendinez, Arturo R Palomares, Beatriz Perez-Nevot, Lidia Aguado, Alvaro Mayor-Olea, Maximiliano Ruiz-Galdon, Armando Reyes-Engel
BMC Medical Genetics , 2011, DOI: 10.1186/1471-2350-12-75
Abstract: A case-control study was designed to evaluate the impact of genetic polymorphisms above described on TMD. A total of 229 individuals (69% women) were included at the study; 86 were patients with TMD and 143 were healthy control subjects. Subjects underwent to a clinical examination following the guidelines by the Research Diagnostic Criteria for Temporomandibular Disorders (RDC/TMD). Genotyping of 20 Single Nucleotide Polymorphisms (SNPs), divided in two groups, was performed by multiplex minisequencing preceded by multiplex PCR. Other seven genetic polymorphisms different from SNPs (deletions, insertions, tandem repeat, null genotype) were achieved by a multiplex-PCR. A chi-square test was performed to determine the differences in genotype and allelic frequencies between TMD patients and healthy subjects. To estimate TMD risk, in those polymorphisms that shown significant differences, odds ratio (OR) with a 95% of confidence interval were calculated.Six of the polymorphisms showed statistical associations with TMD. Four of them are related to enzymes of folates metabolism: Allele G of Serine Hydoxymethyltransferase 1 (SHMT1) rs1979277 (OR = 3.99; 95%CI 1.72, 9.25; p = 0.002), allele G of SHMT1 rs638416 (OR = 2.80; 95%CI 1.51, 5.21; p = 0.013), allele T of Methylentetrahydrofolate Dehydrogenase (MTHFD) rs2236225 (OR = 3.09; 95%CI 1.27, 7.50; p = 0.016) and allele A of Methionine Synthase Reductase (MTRR) rs1801394 (OR = 2.35; 95CI 1.10, 5.00; p = 0.037). An inflammatory oxidative stress enzyme, Gluthatione S-Tranferase Mu-1(GSTM1), null allele (OR = 2.21; 95%CI 1.24, 4.36; p = 0.030) and a neurotransmission receptor, Dopamine Receptor D4 (DRD4), long allele of 48 bp-repeat (OR = 3.62; 95%CI 0.76, 17.26; p = 0.161).Some genetic polymorphisms related to folates metabolism, inflammatory oxidative stress, and neurotransmission responses to pain, has been significantly associated to TMD syndromeTemporomandibular joint disorder (TMD) is characterized by a set of symptoms
Human genetic selection on the MTHFR 677C>T polymorphism
álvaro Mayor-Olea, Gonzalo Callejón, Arturo R Palomares, Ana J Jiménez, María Gaitán, Alfonso Rodríguez, Maximiliano Ruiz, Armando Reyes-Engel
BMC Medical Genetics , 2008, DOI: 10.1186/1471-2350-9-104
Abstract: A total of 1305 subjects born in the 20th century were genotyped for the 677C>T polymorphism using allele specific real-time PCR with Taqman? probes. A section of our population (n = 276) born in 1980–1989 was compared with fetal samples (n = 344) from SA of unknown etiology from the same period.An increase in the frequency of the T allele (0.38 vs 0.47; p < 0.001) and of the TT genotype (0.14 vs 0.24; p < 0.001) in subjects born in the last quarter of the century was observed. In the 1980–1989 period, the results show that the frequency of the wild type genotype (CC) is about tenfold lower in the SA samples than in the controls (0.03 vs 0.33; p < 0.001) and that the frequency of the TT genotype increases in the controls (0.19 to 0.27) and in the SA samples (0.20 to 0.33 (p < 0.01)); r = 0.98.Selection in favor of the T allele has been detected. This selection could be due to the increased fetal viability in early stages of embryonic development, as is deduced by the increase of mutants in both living and SA populations.The methylenetetrahydrofolate reductase enzyme (MTHFR) catalyzes a reaction that produces 5-methyltetrahydrofolate (5-methylTHF), the methyl donor for homocysteine in the synthesis of methionine. The 677C>T mutation of the MTHFR gene has been associated with a thermolabile enzyme with decreased activity that may cause an increase in plasma homocysteine concentrations [1] when folate status is poor. This polymorphism is one of the most widely studied clinically relevant polymorphisms in humans, as it is related to cardiovascular disease [2] and neural tube defects (NTD; 601634) [3].A large number of studies have provided a broad overview of the prevalence of the 677C>T polymorphism in different human populations, showing that the distribution of frequencies is diverse [4]. These differences have been also observed between groups of different ages in the same Spanish population (older and younger than 24 years) [5] and in a Swiss population (older and
Resese a de los libros "The language of hermeneutics. Gadamer and Heidegger in dialogue" de Rod Coltman y "Beyond being. Gadamer's post-platonic hermenutical ontology" de Brice R. Wachterhauser
Jorge Armando Reyes Escobar
Signos filosóficos , 2000,
Hegel’s Science of Logic and the “Sociality of Reason”
Jorge Armando Reyes
Cosmos and History : the Journal of Natural and Social Philosophy , 2007,
Abstract: span/spanspanspan style="font-family: Times New Roman; font-size: 16px" class="Apple-style-span"spanThis paper is intended to examine the significance of Hegelrsquo;s emScience of Logic/em for social thought. I attempt to show that the claims advocating directly the social character of reason present in Hegelrsquo;s thought must be regarded against the background of the logical demand of a presuppositionless thinking. After reviewing the criticisms addressed against the possibility of fulfilling that demand, I suggest that Hegelrsquo;s demand of presuppositionless thinking could be understood as a transformation ofnbsp; Kantrsquo;s transcendental philosophy (particularly the concept of the Originary Synthetic Unity of Apperception mdash;OSUA).nbsp; That explanation will allow us to suggest that the demand of presuppositionless thinking works as the recognition of a gathering in which the ldquo;meaningrdquo; is both unified and dispersed. In base to that idea, it will be explained why most of the interpretations which emphasizes the social character of reason as the key to account the development of Hegelrsquo;s philosophy fail to recognize that presuppositionless ground.nbsp; So, it will be concluded that the sociality of reason must be understood as a determination reason gives itself through its self-situating in the field of meaning. br //span/span/span
Health Disparities from Economic Burden of Diabetes in Middle-income Countries: Evidence from México
Armando Arredondo, Gabriela Reyes
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0068443
Abstract: The rapid growth of diabetes in middle-income countries is generating disparities in global health. In this context we conducted a study to quantify the health disparities from the economic burden of diabetes in México. Evaluative research based on a longitudinal design, using cost methodology by instrumentation. For the estimation of epidemiological changes during the 2010–2012 period, several probabilistic models were developed using the Box-Jenkins technique. The financial requirements were obtained from expected case management costs by disease and the application of an econometric adjustment factor to control the effects of inflation. Comparing the economic impact in 2010 versus 2012 (p<0.05), there was a 33% increase in financial requirements. The total amount for diabetes in 2011 (US dollars) was $7.7 billion. It includes $3.4 billion in direct costs and $4.3 in indirect costs. The total direct costs were $.4 billion to the Ministry of Health (SSA), serving the uninsured population; $1.2 to the institutions serving the insured population (Mexican Institute for Social Security–IMSS-, and Institute for Social Security and Services for State Workers-ISSSTE-); $1.8 to users; and $.1 to Private Health Insurance (PHI). If the risk factors and the different health care models remain as they currently are in the analyzed institutions, health disparities in terms of financial implications will have the greatest impact on users’ pockets. In middle-income countries, health disparities generated by the economic burden of diabetes is one of the main reasons for catastrophic health expenditure. Health disparities generated by the economic burden of diabetes suggests the need to design and review the current organization of health systems and the relevance of moving from biomedical models and curative health care to preventive and socio-medical models to meet expected challenges from diseases like diabetes in middle-income countries.
Some homological properties of skew PBW extensions
Oswaldo Lezama,Armando Reyes
Mathematics , 2013,
Abstract: We prove that if R is a left Noetherian and left regular ring then the same is true for any bijective skew PBW extension A of R. From this we get Serre's Theorem for such extensions. We show that skew PBW extensions and its localizations include a wide variety of rings and algebras of interest for modern mathematical physics such as PBW extensions, well known classes of Ore algebras, operator algebras, diffusion algebras, quantum algebras, quadratic algebras in 3-variables, skew quantum polynomials, among many others. We estimate the global, Krull and Goldie dimensions, and also Quillen's K-groups.
Ab initio Hartree-Fock with electronic correlation study of the electronic properties of MgB2
Armando Reyes-Serrato,Donald H. Galvan
Physics , 2001,
Abstract: We performed all-electron ab initio self-consistent field Hartree-Fock linear combination of atomic orbital, in which electronic correlation using density functional were included to perform electronic calculations in MgB2 new superconductor. Superconductivity in this compound was correlated with existence of Px,y band holes at Gamma point.
Frequency and severity of OSAHS in Mexican adolescents. The role of BMI and neck circumference  [PDF]
Armando Partida-Gaytán, Arturo Berber, Blanca Estela del Río-Navarro, Reyes Haro-Valencia
Health (Health) , 2013, DOI: 10.4236/health.2013.58A3001

Background: Overweight and obesity are major public-health issues in Mexico. Sleep breathing disorders directly impact the health of affected subjects. The aim of this study was to describe the frequency and severity of obstructive sleep apnea/hypopnea syndrome (OSAHS) in Mexican adolescents grouped by weight status. Secondary objectives were to describe the influence of body mass index (BMI) and neck circumference (NC) as predictive factors of OSAH. Method: Somatometric, demographic data and full-night polysomnography were done. Linear and logistic regression models described the relationship between BMI and NC with OSAHS presence and severity. Receiver-Operating-Characteristics (ROC) curves showed different sensitivity and specificity performances of BMI and NC cutoff-values. Results: OSAHS frequency and severity were significantly greater in obese and extremely-obese adolescents (8% vs 22% vs 67%; p < 0.001). Linear regression showed an AHI increase of 0.940 events/hour for every centimeter-increase in NC and 0.696 events/hour for every1 kg/m2-increase in BMI. Logistic-regression showed extreme-obesity as the main risk factor (OR 9.9) for diagnosis of OSAHS. ROC curves showed an area under the curve (AUC) of 0.83 for BMI defined cutoff-values, and of 0.80 for BMI percentile-for-age cutoff-values. The AUC of NC ROC curve was 0.8043. Conclusion: This is the largest study made on Latin-American population evaluating the frequency and severity of OSAHS with full-night polysomnography. We showed that obese and extremely-obese Mexican-adolescents are at highest risk for OSAHS. Increasing BMI and NC showed positive correlation with AHI. Different BMI cut-off values showed similar diagnostic performance. Extreme-obesity increases 8 times the risk association for OSAHS.

Variabilidad interobservador de las presiones sistólicas por el método Doppler
Aldama,Alfredo; Armando,Seuc; Reyes,Bárbara; Rodríguez,Alicia;
Revista Cubana de Investigaciones Biom??dicas , 2004,
Abstract: 30 patients were independently and blindly studied by 2 technicians. their humeral systolic, popliteal, pedal and posterior tibial arterial pressures were measured on the right side to quantify the interobserver variability in the measurement of the systolic pressures of the limbs with a doppler speedometer. arterial pressure values between 46 mmhg and 250 mmhg were found. in the popliteal artery and in the pedal and the posterior tibial, it was observed a regression straight line with a mildly negative slope, differently from the arm, where the slope was slightly negative, with a mean and confidence interval ranges for the differences and the means of the differences more elevated than the observed at the arm level. the measurement variablity between the 2 observers was small. the popliteal artery was stressed as the responsible for the greatest differences
Productividad total de factores y reducción de costos en la industria manufacturera mexicana, 1994 -1999
Armando Nevárez Sida,ángel Mauricio Reyes Terrón
Economía, sociedad y territorio , 2004,
Abstract: El presente trabajo analiza la productividad total de factores en la industria manufacturera mexicana en el periodo de 1994 a 1999. El cambio experimentado por esta variable es interpretado como reducción o incremento real de costos de acuerdo con la metodología propuesta por Harberger (1998). Se logró la identificación de aquellos subsectores y clases industriales que redujeron o aumentaron costos, así como la magnitud de estos cambios en términos monetarios. Las clases industriales que presentan una reducción de costos significativa al interior de un subsector son generalmente pocas, mientras que el resto presenta peque as reducciones de costos o incrementos.
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